A tennis player keeps track of the number of successful first serves he makes. During the first 8 service points of a game, only

Question

A tennis player keeps track of the number of successful first serves he makes. During the first 8 service points of a game,
only 2 of his first serves are playable, so his first serve percentage is 25%.
How many more consecutive successful first serves must he have to raise his first serve percentage to 60%?

Kunduz · Accepted Answer

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